Abstract: When a personal authentication is to be executed, the encryption section of an IC card encrypts biological data and supplies the obtained ciphertext to a sensor unit. When the decryption section of the sensor unit obtains biological data by decrypting the ciphertext, a collation section collates the biological data with input biological measurement data, thereby authenticating personal identification.

Abstract: A device for compressing and feeding to a microturbine power generator a high humidity fuel gas such as biogas, which cools the high humidity fuel gas condensed by the compressor using an air-cooling type fin-tube radiator, condenses and liquefies the moisture, then removes it by a moisture-removing means such as a gas/liquid separator or adsorption type moisture-removing tank, which requires only enough power to drive a cooling fan, which heats the fuel gas from which the majority of the moisture has been removed in a heat exchanger utilizing the heat of compression generated in the compressor, then feeds it to piping leading to the microturbine power generator, and which is free from the residual moisture liquefying and freezing even if the fuel gas is cooled in the piping.

Abstract: When a personal authentication is to be executed, the encryption section of an IC card encrypts biological data and supplies the obtained ciphertext to a sensor unit. When the decryption section of the sensor unit obtains biological data by decrypting the ciphertext, a collation section collates the biological data with input biological measurement data, thereby authenticating personal identification.

Abstract: In an encryption apparatus for encrypting a data body to contain an encrypted data body in transmission data and transmitting the transmission data to a receiver, the transmission data includes sender's key recovery data obtained by encrypting recovery information for recovering a key for decrypting the encrypted data body to allow a key recovery agent registered by a sender to decrypt the recovery information, and receiver's key recovery data obtained by encrypting the recovery information for recovering the key for decrypting the encrypted data body to allow a key recovery agent registered by a receiver to decrypt the recovery information.

Abstract: A device for compressing and feeding to a microturbine power generator a high humidity fuel gas such as biogas, which cools the high humidity fuel gas condensed by the compressor using an air-cooling type fin-tube radiator, condenses and liquefies the moisture, then removes it by a moisture-removing means such as a gas/liquid separator or adsorption type moisture-removing tank, which requires only enough power to drive a cooling fan, which heats the fuel gas from which the majority of the moisture has been removed in a heat exchanger utilizing the heat of compression generated in the compressor, then feeds it to piping leading to the microturbine power generator, and which is free from the residual moisture liquefying and freezing even if the fuel gas is cooled in the piping.

Abstract: An information processing system includes a first information processing apparatus and a second information processing apparatus arranged separate from the first information processing apparatus and capable of exchanging a signal with the first information processing apparatus. The first information processing apparatus includes a first key generator for generating a first key, and a first encrypting unit for encrypting data using the first key generated by the first key generator to generate first encrypted information. The second information processing apparatus includes a second key storage unit for storing a second key, and a second encrypting unit for encrypting the first key using the second key stored in the second storage unit to generate second encrypted information.